22126861 has 2 divisors, whose sum is σ = 22126862. Its totient is φ = 22126860.

The previous prime is 22126847. The next prime is 22126889. The reversal of 22126861 is 16862122.

It is an a-pointer prime, because the next prime (22126889) can be obtained adding 22126861 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 10361961 = 3430^2 + 3219^2 .

It is a cyclic number.

It is not a de Polignac number, because 22126861 - 2¹³ = 22118669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22126831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11063430 + 11063431.

It is an arithmetic number, because the mean of its divisors is an integer number (11063431).

Almost surely, 2^22126861 is an apocalyptic number.

It is an amenable number.

22126861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22126861 is an equidigital number, since it uses as much as digits as its factorization.

22126861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 22126861 is about 4703.9197484651. The cubic root of 22126861 is about 280.7414912945.

Adding to 22126861 its reverse (16862122), we get a palindrome (38988983).

The spelling of 22126861 in words is "twenty-two million, one hundred twenty-six thousand, eight hundred sixty-one".